"To be honest for me the first goal is a joke that it can be allowed like this," Akanji told the BBC.
"I see Rashford, he’s clearly offside so I play him offside. He runs to the last second and stops when the ball is right in front of him and right in front of Eddy [Ederson] to score the goal. Then he stops because Bruno is calling him because he’s not offside.
"I understand he doesn’t touch the ball but he runs for 30 metres, he’s chasing the ball. It’s clearly offside.
"Also the referee doesn’t even look at the situation. When it gets explained at the beginning of the year I thought it was clearly offside. In the end it’s not offside."
United defeated City 2-1 in the Premier League on Sunday thanks to goals from from Bruno Fernandes and Marcus Rashford.
However, Fernandes' strike has remained a major subject over offside claims.
